[TASK] Use `enableMultiSelectFilterTextfield` in pages and tt_content

Enable the usage of `enableMultiSelectFilterTextfield` for the field
`fe_group` in the TCA of pages and tt_content.

Resolves: #76444
Releases: master, 7.6
Change-Id: Ia4b3fd509b8a5e338f5f46e0fd49e89d600da982
Reviewed-on: https://review.typo3.org/48439


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Marco Bresch <marco.bresch@starfinanz.de>
Reviewed-by: Marco Bresch <marco.bresch@starfinanz.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>